Which of the following is a source of carbon skeletons that are used in the synthesis of amino acids?
A. Acetyl-CoA
B. Glycolysis intermediates
C. TCA cycle intermediates
D. All of the choices are correct.
Answer: D
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Bacteria divide by
a) binary fission. b) spore formation. c) mitosis. d) budding.
The process by which the major land masses have shifted their positions, changed shapes and separated from each other, is known as
A. Cotranslational sorting. B. Continental drift. C. Depolarization of land masses. D. Differential land movement. E. Cyclic land drift.
Eye drops used by an ophthalmologist to dilate the eyes for an eye exam act on the nerves that control the ____
a. fovea b. lens c. ciliary muscle d. cornea e. iris
The cell in the accompanying illustration is in ____
a. prophase I. b. metaphase I. c. anaphase I. d. prophase II. e. anaphase II.